Cylinder liner for Renault Trucks AE390

The cylinder liner, identified by part number 154954, functions as the internal wall of the engine cylinder within the Renault Trucks AE390 power unit. It provides a smooth, cylindrical surface for the piston to travel against during operation. In this engine configuration, the liner is designed to interact with the piston rings to maintain proper compression and prevent combustion gases from escaping into the crankcase or oil from entering the combustion chamber. It is a wet-type liner, meaning it maintains direct contact with the engine coolant to facilitate heat transfer away from the combustion zone.

This component is specifically engineered for the Renault Trucks AE390 engine. It is installed within the engine block to restore the internal geometry of the cylinder bore. Proper installation ensures that the piston maintains its seal, which is necessary for the engine to operate at its intended power levels and efficiency. Maintenance of the cylinder liner is typically performed during engine overhauls when the surface shows signs of wear, scoring, or thermal damage that affects the sealing integrity of the piston rings.